401313133887 has 4 divisors (see below), whose sum is σ = 535084178520. Its totient is φ = 267542089256.

The previous prime is 401313133877. The next prime is 401313133901. The reversal of 401313133887 is 788331313104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401313133887 is a prime.

It is a super-2 number, since 2×401313133887² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401313133807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66885522312 + ... + 66885522317.

It is an arithmetic number, because the mean of its divisors is an integer number (133771044630).

Almost surely, 2^401313133887 is an apocalyptic number.

401313133887 is a deficient number, since it is larger than the sum of its proper divisors (133771044633).

401313133887 is a wasteful number, since it uses less digits than its factorization.

401313133887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133771044632.

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 401313133887 in words is "four hundred one billion, three hundred thirteen million, one hundred thirty-three thousand, eight hundred eighty-seven".